* {
  font: 14px/1.5em "PingFang", tahoma, arial, "Hiragino Sans GB";
}
html,
body {
  overflow: visible;
}
/*内容开始*/
.main-container .main-left {
  position: relative;
  flex-basis: 50%;
}
.main-container .main-left .introduce-box {
  width: 80%;
  margin: 0 auto;
}
.main-container .main-left .introduce-box p {
  display: none;
}
.main-container .main-left .introduce-box p:nth-of-type(1) {
  display: block;
  margin-top: 60%;
}
.main-container .main-left .introduce-box p:nth-of-type(1) i {
  display: block;
  font-size: 250px;
  color: #fff;
  text-align: center;
}
.main-container .main-right {
  flex-basis: 50%;
}
legend {
  color: #555;
  font-size: 25px;
  padding-bottom: 40px !important;
}
/*内容结束*/
